With regards to Square Enix trying to crack down on advertisement slots in the Duty Roulette tab of the Party Finder, wouldn't a design decision that would help and should be pretty easy to implement be to simply prevent the minimum item level from being set to higher than what's maximally possible at the moment? I can't think of any good reason why a party should have say a minimum item level requirement of 999 in order to join; it makes it impossible for the party to be joined and thus makes advertisements more likely as a result.